The temple is located in the heart of
Chengannur, very close to the
Pamba River. The town is considered one of the 32
Namputiri towns in Kerala, and Mahadeva (Shiva) is believed to be the god of the town. The presiding deity Mahadeva in the form of a
lingam faces east, while the image of his consort Bhadrakali is located behind it facing west. The temple is approached through a temple tower, built in
Kerala style, and by passing a golden flagstaff, both of which are axial to the central shrine. There are shrines around the temple in the second precinct for
Shasta and Nilagriva, while an image of
Ganesha is seen in the first precinct. The image of Bhadrakali is made of
panchaloha, an alloy of five metals. It is believed that Perumachuten brought the image to the temple. The temple is built in Kerala-style architecture, which is common in all temples in the South Indian state of Kerala. The temple has a two-storeyed
gopuram or gateway tower, with the upper story having wooden rails covering the
kottupura (a hall of drum beating during festivals). A rectangular wall called the
kshetra-madilluka, pierced by gateways, encloses all of the temple's shrines. The metal-plated flagstaff or
dvajasthambam is located axial to the temple tower leading to the central sanctum, and there is a
deepastambha, which is a lamp post. The
chuttambalam is the outer pavilion within the temple walls. The central shrine and the associated hall is located in a rectangular structure called
nalambalam. Between the entrance of the
nalambalam and the sanctum, there is a raised square platform called a
namaskara mandapa which has a pyramidal roof.
Thevrapura, the kitchen used to cook offerings to the deity is located on the left of the
namaskara mandapa from the entrance.
Balithara is an altar used for making ritualistic offerings to demigods and the festive deities. The central shrine called the
sri-kovil houses the image of the presiding deity. It is on an elevated platform with a single door reached through a flight of five steps. Both sides of the doors have images of guardian deities called
Dvarapalakas. As per Kerala rituals, only the main priest called
Thantri and the second priest called
Melshanthi can enter the
sri-kovil. The central shrine has a circular plan with a base of granite, superstructure of laterite and conical roof made of terracotta tile supported from inside by a wooden structure. The lower half of the
sri-kovil consists of the basement, the pillar or the wall, called
stambha or
bhithi and the entablature called
prasthara in the ratio 1:2:1, in height. Similarly the upper half is divided into the neck called
griva, the roof tower called
shikhara and the finial
kalasam (made of copper) in the same ratio. The roof projects in two levels to protect the inner structure from heavy rains during monsoon seasons. The roof of the temple and some of the pillars have lavish wood and stucco carvings depicting various stories of ancient epics, the
Ramayana and
Mahabharata. ==Festival and worship practises==